Mechanical stoker



A. B. FAHNESTOCK.

MECHANICAL STOKER.

APPLICAUGN FILED fau. 21. |920.

' Patented Feb 7, 1922.

WITNESSFS.

A. B. FAHNESTOCK.

MECHANICAL sToKEH.

APPLICATON FILED FEB. 21,1920. 1,405,677. Patented Feb. 7, 1922.

3 SHEETS-SHEET 2.

A. B. FAHNESTOCK.

MECHANICAL STOKER.

APPLxcAUoN FILED rf.21.192o.

Patented Feb. 7, 1922,

3 SHEETS-SHEET 3.

NToR fa/ UNITED STATES PATENT OFFICE.

ADAM B. FAHNESTOCK, 0F GREAT NECK, NEW YORK, ASSIGNOR, BY MESNE ASSIGN.. MENTS, T0 ELVIN MECHANICAL STOKER COMPANY, 0F WILMINGTON, DELAWARE,

A CORPORATION OF DELAWARE.

MECHANICAL STOKER.

Specification of Letters Patent.

Patented Feb. '7, 1922;

To all lwhom t may concern.:

Be it known that I, ADAM B. FAHNEs'roCK, of Great Neck, in the county of Nassau and State of New York, have invented a certain new and useful Improvement in Mechanical Stokers, of which improvement the following is a specification.

My invention relates to means for mechanically feeding fuel to locomotive and other steam boiler furnaces, of the class or type in which the members which act directly to project the fuel into the furnace are in the form of fuel carrying and throwing shovels, moving about axes adjacent to a firing opening in the furnace, as generally exemplified in Letters Patent of the United States Nos. 1,058,356; 1,111,531; and 1,128,428, granted and issued to Albert G. Elvin, under dates of April 8, 1913, September 22, 1914, and'February 16, 1915, respectively, and No. 1,267 ,644, to said Albert G. Elvin, myself, and Frank H. Clark, under dat@ of May 28, 1918.

The object of my invention is to provide, in a mechanical stoker of the type aforesaid, simple, effective, and reliable means for preliminarily reducing the fuel supplied thereto, to size proper for the action of the delivering shovels, and thereafter supplying it to said shovels in desired quantities, and at desired rates of speed.

The improvement claimed is hereinafter fully set forth.

In the accompanying drawings: Figure 1 is a view, partly in side elevation, and partly in vertical section, of the adjoining portions of a coupled locomotive engine and tender, illustrating an application of my invention; Fig. 2, a plan or top view of the fuel reducing mechanism; Fig. 3, a side view, in elevation, of the same; Fi 4, a vertical, longitudinal section throng the crusher frame, on the line 4-4 of Fig. 2; Fig. 5, a transverse section,on the line 5--5 of Fig. 4; Fig. 6, a partial right hand end View, in elevation of Fig. 2; Fig. 7, an end view, in elevation, with the conveyor casing in section; and, Fi 8, a partial left hand view, in elevation of Fig. 2 and Fig. 9 is a fragmentary detail view of the variable coupling means.

Referring descriptively to the specific embodiment of my invention which is herein exemplified, it is, as in Letters Patent No. 1,058,356; 1,128,428, and 1,267,644 aforesaid, illustrated as applied in connection with a locomotive engine, (indicated as a whole by B), and a tender, (indicated as a whole by A), wh1ch are coupled together for service, 1n the ordlnary manner, by a draw bar, C, such application of my invention being made, as in said Letters Patent, in connection with the mechanical conveyance of fuel, by a conveyor and elevator, from the coal 'space or coal bin, a, of the tender, to proxunity wlth the firing door opening, b', of the irebox, b, of the locomotive, and the intermittent projection of apportioned quantitles of the fuel, through said opening, into the firebox.

In the pratcice of my invention, I provide an actuating motor, 5, which may be operated either by fluid pressure or electrically, as preferred, and, which, through suitable intermediate connections, effects the coordinated operation of the several members of the ap aratus, that which acts preliminarily upon t e fuel, being the mechanismfor reducing it to proper size for its passage through the apparatus, and feeding it for final delivery by the shovels thereof, which mechanism will now be described.

A`crusher frame, comprising side members, 3, and end members, 3a, which are bolted, as well as tongued and grooved together, to form a rigid structure, is secured to the bottom plate, a', of the tender coal bin, a, below a fuel supply passage, a2., therein, to which it is open. Fixed Crusher jaws, 4, 4, are formed on, or fixed to, the inner faces of the end members of the frame, and a movable double faced crusher jaw, 4, is fitted to be reciprocated longitudinally in the frame, between the fixed jaws, by a variable traverse mechanism, which accords, in its essential features, with that set forth in Letters Patent of the United Statesv No. 1,323,972, granted and issued to me under date of December 2, 1919 and which will be hereinafter described.

A transverse oscillatory operating shaft, 44,

is journalled in bearings,`44b, on the movable jaw, said shafthaving fitted freely upon it a jaw coupling member hub, 47, formed integral with a downwardly extending arm, 47,

traverse on horizontal guide ways, 3", on the side members of the frame, and maintain the movable jaw in a rectilinear course during its reciprocating movements.

The opposing faces of the movable and the fixed jaws are inclined, in opposite directions, as more clearly shown in Fig. 4, and are waved, or curved, in alternately oposite directions, in the direction of their ength, as shown in Fig. 2, and provided with projecting teeth, 4", at the bottoms of their inclined'faces. Prongs, 4c, may also be formed on said faces. The wallsof the movable jaw extend, in vertical planes, be-

low the teeth, 4b, and, in the reciprocating movements of the jaw, traverse over longitudinally extending delivery plates, 4d, secured to the frame. Any lumps of coal which fall through the 4passage, 1.2, in the bottom plate of the tender coal bin, into the spaces between the movable and the fixed jaw, are crushed, in passing through said spaces, to size suitable for the operation of the fuel throwing shovels, by the alternately opposite movements of the movable jaw, and drop, in such crushed condition, on the delivery plates, 4d, from which they are pushed, by the lower portions of the walls of the movable jaw, in its movements in alternately opposite directions, into the subjacent conveyor casing, 2, and carried by theconveyor, 2, therein, and by an elevator, to the shovels.

Traverse, the degree of which is variable as desired, in accordance wit-h greater or lessY required rapidity of supply of fuel, is imparted to the movable j aw, 4*", by mechanism actuated by the motor, 5, which will now be described. A shaft, 5a, rotated by the motor, is connected by a universal joint coupling of any suitable known form, to ashaft, 14, journalled in a gear case, 14, in .front of the crusher frame, and carrying a spur gear, 29,

which engages a similar gear, 5, fixed on a shaft, 2", journalled in the same case,and coupled to a shaft, 2, which actuates the conveyor. A Worm, 5*, on the shaft, 2, engages a Worm wheel, 5k, on a shaft, 5"", which is also journalled in the gear case, 14, and has, fixed upon it, a crank, 5m, which is coupled, by a connectin rod, 5g, to the arm, 47 of the shaft, 44, to w ich arm it imparts an oscillatory movement, of invariable traverse. This, or a lesser ranlge of traverse, down to zero, is, as in Letters atent No. 1,323,972 aforesaid, imparted to the shaft, 44, and movable jaw, 4, in which it is journalled, by longitudinal adjustment of the coupling member, 48, of the shaft, relatively to the coupling member, 47 of the oscillatory arm, 47. The coupling member 48 is provided with a forked extension comprising legs 48, see Fig. 2, which legs are adapted to clutch lwith corresponding l recesses 47 b diametrically oppositely forme in the coupling member 47". To allow for coupling members are fully clutched and the I maximum oscillatory movement imparted to said coupling members 47, by the arm 47, and connecting rod 5g, will be transmitted to coupling member 48. If, however, the coupling member 48 be partially withdrawn from its complementary coupling member 47, a certain amount of lost motion will exist between these members so that the member 47 a will move a certain degree in both directions before the member 48 will be affected. It will be seen, therefore, that by a limited longitudinal movement of the member 48 with respect to its engagement with the member 47a, a variable range of tranverse of the crusher frame can be obtained. To provide for this variable adjustment, two parallel rods, 51, are connected to the coupling member, 48, and, passing through slots in the movable jaw, carry, on their outer. ends, arms,

49f, connected by a pin, 49", which engages a slot in the end of an arm, 49d, fixed on a shaft 49, which is j ournalled in bearings on one of the side members of the Crusher frame. These slots will permit the vertical movements of the rods 51c during the oscillation of the coupling member 48 to which the inner end of said rods are connected. An arm, 49, on the forward end of the shaft, 49, is coupled, by a link, 491, to an operating handle, 49a, journalled on t-he tender tank, and having a locking latch engaging a toothed segment, 49k, fixed to said handle bearing. By the movement of the handle, 49, the shaft, 49, can be swung in its bearings, and, through the connections described, will move the coupling member, 48, in either direction, as desired.

The shaft, 2n, is connected, by a universal coupling, to a shaft, 2, by which the conveyor, 2, is rotated, and the fuel throwin shovels, 11, and conveyor (not shown) whic operates in the casing, 4, are actuated by the motor, 5, through suitable intermediate connections, which do not, in and of themselves, 115

form part of my present invention, and,

therefore, are not herein in detail set forth.

My invention avoids thenecessity of preliminarily preparing fuel for supply to the tenders of locomotives on which mechanical 120 by mechanism connected to, and operative 125 with, that of the-Stoker proper, and presents the further substantiall advanta e of dispens, ing with special measuring an feeding devices, as the rate of delivery of the fuel from the crusher may be regulated by the fireman, 130

or the delivery be entirely discontinued, as desired, by suitable adj ustment of the mechaf nism by which the variation of traverse of the'movable crusher jaw is effected.

I claim as my invention and desire to secure by Letters Patent:

1. In a mechanical Stoker, the combination of a fuel bin; means, receiving its sup-A ply therefrom, for reducing the fuel to the proper size, delivery plates positioned below the discharge of said reducing means and means fixed to and movable with a member of the reducing means, cooperating with said delivery plates, for delivering fuel therefrom into a conveying appliance.

2. In a mechanical stoker, the combination of va fuel bin; means, receiving its supply therefrom, for reducing the fuel to the proper size, delivery plates positioned below the discharge of said reducing means and means, actuated by said reducing means, cooperating with said delivery plates, foil v delivering fuel therefrom to a conveying appliance; and manually adjustable means for effecting variation of traverse of a movable member of the reducing means.

3. In a mechanical Stoker, the combination of a fuel bin; means, receiving its supply therefrom, for reducing fuel to the proper size, delivery plates positioned below the discharge of said reducing means and means, actuated by said reducing means, co-operating with said delivery plates, for delivering fuel therefrom to conveying and projecting appliances; manually adjustable means for effecting variation of traverse of a movable memberof the reducing means; a motor; and intermediate connections through which said motor effects the co-ordinated operation of the reducing means, the delivery means,

the variable traverse effecting means, and the fuelprojecting mechanism. v

f4. In a mechanical stoker, the combination of a fuel bin, having av supply passage in its floor; a crusher frame located below said floor and passage; a movable crusher jaw adapted to be reciprocated between fixed crusher jaws in said frame, and having walls projecting downwardly from its working faces, and fixed delivery plates, over which the bottoms of said walls traverse for discharging the fuel therefrom.

5. In a mechanical stoker, the combination of a fuel bin, having a supply passage in its fioor; a crusher frame, located below said floor and passage; fixed crusher jaws extending transversel in said frame; a movable crusher jaw, a apted to be reciprocated between'said fixed jaws provided with means for delivering the fuel therefrom to conveying and projecting appliances; an oscilfloor; a crusher frame located below said floor and passage; fixed crusher jaws, extending transversely in said frame; a movable crusher jaw, adapted to'be reciprocated between said fixed jaws provided with means for delivering the fuel therefrom to conveying and projecting appliances; stub shafts fixed onl the movable jaw; rollers, mounted on said stub shafts; guide ways on, the crusher frame, on which said rollers traverse; and power actuated means for operating said apparatus. j

ADAM B. FAHN'ESTOCK.

Witnesses E. GOODMAN, J. WEIN-AR. 

